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Built on ISFDB, Wikipedia, Wikidata and Open Library. Curated reading orders carry their reasoning on the page; the rest follow publication order. Data sources & licenses

© Loreful · data: ISFDB · CC BY

More like Invaders

anchored on:science fiction

but

Mood

The mood the book leaves you in.

  • The reading experience is propelled by journeys, exploration, and physical risk; excitement and forward momentum dominate over dread or introspection.
  • Joy and loss are deliberately mixed; the resolution grants characters something real while taking something else away, leaving warmth and sorrow together.
  • The book demands work from the reader — dense prose, difficult structure, unfamiliar ideas, or morally uncomfortable material — as part of its intended effect.
  • Grim events, cruelty, or despair dominate the atmosphere, and the book does not soften them with comfort or comic relief.
  • The atmosphere is quietly unsettling — wrongness, unease, and the uncanny pervade the book without necessarily escalating into overt horror.
  • The book is built to move the reader; character feeling is foregrounded and major scenes aim at a strong emotional response.
  • Humor is a primary aim and the prose plays for laughs — comic situations, wit, or dialogue produce sustained comedy, not occasional levity.
  • The book insists that things can improve; effort and decency are shown to matter, and the arc bends toward better outcomes even through hardship.
  • The book teaches as it goes — real facts, history, science, or craft are conveyed in enough depth that learning is part of the reading experience.
  • The book is designed to uplift and motivate, presenting perseverance or achievement in a way that invites the reader to aspire or act.
  • The overall register is cheerful and easygoing; stakes are kept gentle and the book avoids dwelling on pain or dread.
  • Withheld information drives the experience; the book sustains enigmas and secrets the reader wants resolved, whatever its genre.
  • The book is contemplative and inward-looking, giving more weight to thought, memory, and meaning than to external events.
  • The book works as comfort reading — low tension, a soothing pace, and an atmosphere the reader can unwind in.
  • Grief, loss, or melancholy set the dominant register, and the book lets sorrow stand rather than resolving it into comfort.
  • Sustained suspense is the point; the book keeps the reader braced for what happens next through danger, pressure, or impending revelation.
  • Playful invention and charm define the register — fanciful conceits, light absurdity, and a narration that delights in its own oddity.

About

What the story runs on.

  • Stories in which extraterrestrial beings are central — as characters, cultures, or the object of the plot.
  • Stories about venturing into space to explore — survey missions, astronauts, and the frontier of the unknown beyond Earth.
  • Stories structured as a quest — a journey undertaken to find, deliver, or destroy something of great import.
  • Stories in which staying alive against nature, catastrophe, or scarcity is the central problem.
  • Stories of lovers kept apart by law, family, faith, or station, where the obstacle to love is the plot.
  • Stories in which a friendship — its making, testing, or loss — is the emotional center.
  • Stories of growing up — a young protagonist crossing from childhood into adult knowledge and responsibility.
  • Stories about who a character truly is — self-discovery, doubled lives, and the search for a self.
  • Stories in which a buried family truth — hidden parentage, crimes, or shames — surfaces and reorders the present.
  • Stories driven by maneuvering for power — factions, conspiracies, and statecraft conducted in shadow.
  • Stories in which war itself is the subject — combat, occupation, and what warfare does to soldiers and civilians.
  • Stories organized around investigating a killing — the case, the clues, and the pursuit of the killer, in any genre's clothing.

Shelf

Where it sits in the library.

    • Fiction built on magic or other supernatural elements that have no scientific explanation.
    • Secondary-world fantasy at large scale, where the fate of nations or the world turns on the protagonists' struggle.
    • Fantasy set in a recognizably modern city or contemporary world where the supernatural intrudes on everyday life.
    • Fantasy that blends in horror's atmosphere and imagery, keeping a fantastical frame around grim or frightening material.
    • Action-driven fantasy following warriors or rogues with personal stakes against sorcerous threats, rather than world-spanning conflicts.
    • Fantasy set in a real historical period or a close analogue of one, with magic woven into the era.
    • Fantasy in which protagonists cross from the ordinary world into another world through a portal or similar passage.
    • Fiction that retells or reworks a traditional fairy tale in a new form or setting.
    • Fantasy drawing directly on myths, legends, and folklore, retelling them or building on their figures and logic.
    • Fantasy of ghosts, vampires, shapeshifters, psychics, and similar phenomena, usually set in an otherwise ordinary world.
    • Fiction mixing science-fictional trappings with overtly magical or impossible elements in one setting.
    • Low-stakes fantasy emphasizing comfort, community, and everyday pleasures over conflict and peril.
    • Speculative fiction of pervasive moral ambiguity, violence, and cynicism that rejects heroic conventions — fantasy and SF alike.
      • Fiction that extrapolates from science and technology — future societies, space travel, or speculative inventions — within at least nominally natural laws.
      • Science fiction of interstellar scope — starships, galactic polities, and adventure across star systems.
      • Science fiction committed to scientific rigor, where technical plausibility constrains the story.
      • Science fiction centered on armed forces and warfare, told largely from a military point of view.
      • Science fiction of networked, corporate-dominated near futures, pairing high technology with social decay.
      • Science fiction styled on nineteenth-century steam-powered technology, often in a Victorian or pseudo-Victorian setting.
      • Fiction depicting an oppressive or catastrophic society, presented as a warning.
      • Fiction set after civilization's collapse, following survivors in the ruins of the old world.
      • Fiction in which characters move between past and future, and the mechanics or consequences of that travel drive the plot.
      • Fiction exploring a world where a historical event went differently and history diverged from ours.
      • Science fiction about humanity's first encounter and communication with an alien intelligence.
      • Science fiction in which extraterrestrial forces attack or occupy Earth and humanity resists.
      • Fiction whose primary aim is to frighten or unsettle the reader through dread, menace, or the monstrous.
      • Horror of vast, indifferent, incomprehensible entities before which humanity is insignificant, in the Lovecraft tradition.
      • Horror of decaying houses, buried family secrets, and oppressive atmosphere in the Gothic literary tradition.
      • Horror centered on hauntings and the returning dead.
      • Horror located in the mind — paranoia, obsession, and unreliable perception rather than external monsters.
      • Horror built around the reanimated dead and survival amid their outbreaks.
      • Horror defined by explicit, transgressive gore that refuses to cut away from violence.
      • Speculative fiction of the strange and uncanny that resists both natural explanation and standard genre categories.
      • Fiction organized around solving a crime or puzzle, typically following an investigator toward the identification of a culprit.
      • A puzzle-first mystery that lays out clues so the culprit's identity can be deduced before the reveal.
      • Crime fiction of moral ambiguity, fatalism, and hard-edged style, set among the corrupt and the doomed.
      • A mystery following the realistic routines of police work — forensics, interviews, and case-building.
      • A gentle mystery with an amateur sleuth, a small community, and violence kept off the page.
      • A mystery set in a past era, where the investigation works within that period's methods and society.
      • Fast-paced fiction driven by imminent danger, pursuit, or high-stakes conspiracy, built to sustain tension.
      • A thriller of espionage — agents, tradecraft, and intelligence services in conflict.
      • A thriller centered on lawyers and the courtroom, where litigation carries the suspense.
      • A thriller driven by detailed contemporary or near-future technology, often military or scientific.
      • A thriller whose tension comes from mental states and manipulation between characters rather than external action.
      • Fiction whose central plot is a romantic relationship and its development toward an emotionally satisfying resolution.
      • Romance in which one or both partners are supernatural beings, blending fantasy elements into the love story.
      • A fantasy-romance hybrid in which the romantic arc and the fantasy plot carry equal weight.
      • Romance set in a past era, with courtship shaped by the period's society and manners.
      • Romance set in the present day, without supernatural or historical elements.
      • Fiction set in a real past period, where the historical setting materially shapes characters and events.
        • General and literary fiction emphasizing prose style, character interiority, or formal ambition over genre plot conventions.
        • Fiction in a realistic world where magical events occur and are treated as ordinary, in the tradition of Latin American literature.
        • Fiction that ridicules people, institutions, or society in order to criticize them.
        • Fiction of dreamlike, irrational imagery and logic that breaks from realistic representation.
        • Fiction that plays with narrative convention through metafiction, fragmentation, and self-reference.
        • Fiction propelled by journeys, exploration, and physical peril, where action and survival carry the plot.
        • Adventure fiction of ships and seafaring — naval engagements, voyages, and life at sea.
        • Fiction of the American frontier West — gunmen, ranchers, and lawmen, typically in the late nineteenth century.
        • Fiction centered on soldiers, campaigns, and the experience of warfare, historical or imagined.
          • Fiction written primarily to amuse, using comedic situations, wit, or parody as its organizing principle.
            • Multi-generational fiction following a family or dynasty across decades, with inheritance and kinship as the through-line.
              • Fiction whose world runs on explicit game mechanics — levels, stats, and skills that characters can see and exploit.
                • Fiction about costumed or superpowered heroes and their conflicts with comparable villains.

                Practical

                How long a commitment, whether it stands alone, and whether it has finished.

                Tap a chip to ask for it · tap again to rule it out · once more to clear. Numbers show what would be left.

                • Cover of Starship Troopers
                  Starship Troopers

                  Robert A. Heinlein · standalone novel · 1959

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                  Starship Troopers is a military science fiction novel by American writer Robert A. Heinlein. Written in a few weeks in reaction to the US suspending nuclear tests, the story was first published as a two-part serial in The Magazine of Fantasy & Science Fiction as Starship Soldier, and published as a book by G. P. Putnam's Sons on November 5, 1959.

                • Cover of Ringworld
                  Ringworld

                  series · 5 books · 1970

                  part of Known Space

                  similar byaliensscience fictionadventurousfar futurespaceother star systemsspace opera

                  The Ringworld series is a series of science fiction novels written by American author Larry Niven. It is part of his Known Space series of stories. Its backdrop is the Ringworld, a giant artifact 3 million times the surface area of Earth circling a star. The series is composed of four standalone science fiction novels, the original award-winning book and its three sequels:1970: Ringworld 1979: The Ringworld Engineers 1996: The Ringworld Throne 2004: Ringworld's Children

                • Cover of Starman Jones
                  Starman Jones

                  Robert A. Heinlein · standalone novel · 1953

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                  Starman Jones, a 1953 science fiction novel by Robert A. Heinlein, features a farm boy who wants to go to the stars. Charles Scribner's Sons published the book as part of the Heinlein juveniles series.

                • Cover of Moties
                  Moties

                  series · 4 books · 1974

                  part of CoDominium

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                  Larry Niven and Jerry Pournelle's The Mote in God's Eye (1974) depicts humanity's first contact with an alien species, the Moties, set within the far-future interstellar setting of Pournelle's codominium future history. The Gripping Hand continues that first-contact crisis years later, and Outies, written by J. R. Pournelle, carries the story forward into a new generation. Together the three books trace an escalating encounter between human and Motie civilizations within the codominium universe.

                • Cover of Old Man's War
                  Old Man's War

                  series · 16 books · 2005

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                  The Old Man's War series is a series of science fiction novels by John Scalzi. The first book in the series, Old Man's War, was first published in 2005 by Tor Books, and was nominated for the Hugo Award for Best Novel in 2006. In 2026 it was a finalist for the Hugo Award for Best Series.

                • Cover of Heechee
                  Heechee

                  series · 19 books · 1972

                  completed

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                  The Heechee Saga, also known as the Gateway series, is a series of science fiction novels and short stories by Frederik Pohl. The Heechee are an advanced alien race that visited the Solar System hundreds of millennia ago and then mysteriously disappeared. They left behind bases containing artifacts, including working starships, which are discovered and exploited by humanity.

                • Cover of Lunar Chronicles
                  Lunar Chronicles

                  series · 15 books · 2011

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                  The Lunar Chronicles is a series of four young adult science fiction novels, a novella, and a short story collection written by American author Marissa Meyer and published by Feiwel & Friends. Each book entails a science fictional twist on a classic fairy tale, including "Cinderella", "Little Red Riding Hood", "Rapunzel", and "Snow White". Set in a futuristic world inhabited by various species and creatures, tensions are rising between Earth and its former colony Luna, while both attempt to manage an ongoing pandemic.

                • Cover of Uplift Universe
                  Uplift Universe

                  universe · 13 books · 1980

                  Start hereUplift · Start here

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                  No species, the Galactics insist, ever climbs to sapience alone. For a billion years the elder races have "uplifted" their chosen clients — reshaping some promising animal, gene by patient gene, into a thinking being, then binding it through long ages of indenture. Patron lifts client; client one day becomes patron; and every lineage traces back through the vast Galactic Library to the vanished Progenitors who began it all. Then a ragged band of primates arrives at the stars with no patron to claim them — wolflings, self-made, an affront to a hundred thousand years of law — and worse, these humans have already started uplifting neighbors of their own: the neo-dolphins and neo-chimpanzees of Earthclan. David Brin builds this galaxy across two trilogies. The first — Sundiver, the Hugo- and Nebula-winning Startide Rising, and the Hugo-winning The Uplift War — sends an expedition into the Sun, then follows the dolphin-crewed survey ship Streaker as it flees a discovery that sets fanatical star-clans at war, and a chimp-led resistance on an invaded colony world. The second sequence, Uplift Storm — Brightness Reef, Infinity's Shore, Heaven's Reach — descends to Jijo, a forbidden world where six fallen races hide as illegal settlers, and draws every loose thread toward a reckoning. Short fiction fills the margins. This is space opera with an ecologist's conscience: teeming with invented biologies, wry cross-species banter, and real unease about what we owe the minds we make. Begin with Startide Rising — the saga's beating heart, and readable on its own — or take Sundiver first and read straight through in publication order.

                • Cover of Uplift
                  Uplift

                  series · 5 books · 1980

                  part of Uplift Universe

                  similar byaliensscience fictionadventurousfar futurespaceother star systemsspace opera+1 more

                  David Brin's Uplift trilogy opens with Sundiver, sending human explorers into the Sun itself, then follows a dolphin-crewed starship on the run from hostile aliens in Startide Rising and a fight over the colony world Garth in The Uplift War. The books sit inside Brin's wider Uplift Universe, built on the idea that spacefaring "patron" species genetically engineer younger "client" species into full sapience, with humanity an anomaly that reached the stars without a patron of its own.

                • Cover of The Science Fiction Hall of Fame
                  The Science Fiction Hall of Fame

                  series · 11 books · 1895

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                • Cover of Cities in Flight
                  Cities in Flight

                  series · 10 books · 1950

                  completed

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                  Cities in Flight is a four-volume series of science fiction novels and short stories by American writer James Blish, originally published between 1950 and 1962, which were first known collectively as the "Okie" novels. The series features entire cities that are able to fly through space using an anti-gravity device, the spindizzy. The stories cover roughly two thousand years, from the very near future to the end of the universe. One story, "Earthman, Come Home", won a Retro Hugo Award in 2004 for Best Novelette. Since 1970, the primary edition has been the omnibus volume first published in paperback by Avon Books. Over the years James Blish made many changes to these stories in response to points raised in letters from readers.

                • Cover of Pip & Flinx
                  Pip & Flinx

                  series · 18 books · 1972

                  part of Humanx Commonwealth

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                  The Pip & Flinx novels follow Flinx, a young man with an unusual, mysterious origin, and his ever-present animal companion Pip, across Alan Dean Foster's Humanx Commonwealth setting. Beginning with The Tar-Aiym Krang (1972) — chronologically the second entry, since Foster later filled in Flinx's earlier life — the series grew to fifteen novels published between 1972 and 2017, mixing planetary adventure with a slowly unfolding personal mystery.

                • Cover of Tower and the Hive
                  Tower and the Hive

                  series · 7 books · 1959

                  completed

                  part of The Talents

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                  The Tower and the Hive series opens with The Rowan (1990), following an isolated but powerful telepath who is drawn out of her loneliness by a psychic call for help from a distant Talent facing an alien threat. Anne McCaffrey continued the story across four more novels, Damia, Damia's Children, Lyon's Pride, and the concluding The Tower and the Hive (1999), following later generations of a telepathic family staffing the Prime Towers that give a starfaring human civilization instant communication. The series is set later in the same Talents universe as McCaffrey's earlier Pegasus books.

                • Cover of The Colors of Space
                  The Colors of Space

                  Marion Zimmer Bradley · standalone novel · 1963

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                  The Lhari seem peaceful and friendly, but they go to some lengths to protect their monopoly on faster-than-light travel. One young man is sent to discover their secrets.

                • Cover of Terro-Human Future History
                  Terro-Human Future History

                  universe · 48 books · 1952

                  Start hereFuzzy Sequence · Start here

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                  History does not repeat, Piper's chroniclers are fond of saying — it rhymes, and it rhymes in iron. Reckon the years from the first atomic pile, 1942, Year One of the Atomic Era, and follow the ledger forward some six thousand years: out of a nuclear war that nearly ended everything, up through the Terran Federation and its reach into the stars, down again through collapse and a long neobarbaric dark, and back up into the enlightened empires that rise from the ruins. It is one continuous future history — not a plot but a chronicle, worlds and centuries sharing a single unbroken timeline. H. Beam Piper assembled it in pieces through the 1950s and 60s, novels and novellas bound by chronology rather than by recurring heroes. The anchors are Little Fuzzy, a courtroom argument over whether a small golden native of Zarathustra is a person; Space Viking, raid and revenge amid the wreckage of the interregnum; and the Federation-era Four-Day Planet, The Cosmic Computer, and Uller Uprising. The eras sort cleanly — Federation, the System States War, the Space Vikings of the long dark, the Empire. After Piper's death in 1964 other hands took up the ledger: John F. Carr, who arranged the short fiction into the chronological Federation and Empire collections and carried on the Tanith and Space Viking line, plus Wolfgang Diehr's Fuzzy sequels and Dietmar Arthur Wehr's additions. The register is sober and engineer-eyed — competent men solving hard problems, empires ruled by benign despots, the cool conviction that civilizations rise and fall to the same recurring script. It ranges from the sunlit warmth of the Fuzzy books to the cold steel of a Viking raid. Newcomers start with Little Fuzzy, the warmest and most self-contained, or with Space Viking.

                • Cover of Forerunner
                  Forerunner

                  series · 5 books · 1960

                  completed

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                  Forerunner and its sequel, Forerunner: The Second Venture, follow a young woman on an alien world who joins forces with an off-world traveler on a dangerous search for relics of a vanished, ancient civilization, hoping to find clues to how civilization itself began. It is a self-contained two-book adventure by Andre Norton rather than part of a longer sequence, later gathered as the omnibus The Forerunner Factor.

                • Cover of Space Beagle
                  Space Beagle

                  series · 5 books · 1939

                  completed

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                  The Voyage of the Space Beagle is a 1950 fix-up novel by A. E. van Vogt, stitched together from four previously published pulp stories into a single continuous account of the exploration ship Space Beagle's encounters with a series of dangerous alien life forms. Its episodic, crew-versus-monster structure reads as a loose sequence of adventures rather than one continuous plot.

                • Cover of Bronson Beta
                  Bronson Beta

                  series · 5 books · 1933

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                  When Worlds Collide (1933) and its sequel After Worlds Collide (1934), written together by Edwin Balmer and Philip Wylie, follow a small group of survivors who escape a doomed Earth as the rogue planet Bronson Alpha destroys it, landing on its companion world Bronson Beta to begin again. The two novels form a self-contained disaster-and-survival duology.

                • Cover of Skyward
                  Skyward

                  series · 9 books · 2018

                  part of Cytoverse

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                  On the ruined world of Detritus, humanity lives underground beneath near-constant aerial bombardment from an alien force called the Krell, and Spensa Nightshade wants nothing more than to fly a starfighter, despite her father's reputation as a coward who fled battle. Brandon Sanderson's Skyward follows her fight to earn her wings and clear her father's name, uncovering secrets about her own strange abilities and the planet's buried past across Starsight, Cytonic, and Defiant. Co-author Janci Patterson contributes companion novellas that widen the view to supporting characters.

                • Cover of Barsoom
                  Barsoom

                  series · 53 books · 1917

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                  Barsoom is a fictional representation of the planet Mars created by American pulp fiction author Edgar Rice Burroughs. The first Barsoom tale was serialized as Under the Moons of Mars in pulp magazine The All-Story from February to July 1912 and published compiled as a novel as A Princess of Mars in 1917. It features John Carter, a late-19th-century American Confederate veteran who is mysteriously transported from Earth to the dying world of Mars where he meets and romances the beautiful Martian princess Dejah Thoris. Ten sequels followed over the next three decades, further extending his vision of Barsoom and adding other characters.

                • Cover of Catteni Sequence
                  Catteni Sequence

                  series · 5 books · 1970

                  completed

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                  The Catteni series is a tetralogy of science fiction novels by American writer Anne McCaffrey. In this universe, humans are slaves of aliens, the humanoid Catteni. Woven through all four of the books are details of the relationship between Kristin Bjornsen, a former slave, and Zainal, a renegade Catteni.

                • Cover of Forever War
                  Forever War

                  series · 10 books · 1972

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                  Joe Haldeman's The Forever War (1974) follows a soldier conscripted into a centuries-long interstellar war against the alien Taurans, using relativistic space travel so that months spent in transit correspond to years or decades passing back on Earth. Haldeman later returned to the same conflict in Forever Peace (1997), a thematically connected but separate story, and Forever Free (1999), a direct sequel set years after the original war's end. The first novel won the Hugo, Nebula, and Locus awards and is considered a foundational work of military science fiction.

                • Cover of Double Star
                  Double Star

                  Robert A. Heinlein · standalone novel · 1956

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                  Lorenzo Smythe, the excellent yet unemployed actor, meets Dak Broadbent in a bar. Broadbent hires Lorenzo for an unspecified role, and hustles him onto a rocket ship. Broadbent turns out to be an assistant to the famous interplanetary politician and leader of the Expansionist party: John J. Bonforte. Bonforte, however, has been kidnapped by the political opposition on Mars, and due to Lorenzo's physical similarity to Bonforte, his staff wants Lorenzo to impersonate the politician for an important Martian ceremony.

                • Cover of Science Fiction Megapack
                  Science Fiction Megapack

                  series · 37 books · 1938

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